Thought let me test the OSC features of Reaper a little, connected X360 game controller in ubuntu via joyosc*, which generates nicely osc output, Reaper detects them nicely, BUT ...

OSC signals are arriving in Reaper, but when I am trying to map to some fx parameter they have no effect. Is this normal? What am I doing wrong? Or did I simply forget to switch into one of the right automation recording modes? I thought I did all correctly. Any hints?